On Sat, 5 Aug 2006, Aditya Mahajan wrote:
> \def\myin[#1:#2]{
> \expandafter\ifx\csname in#1\endcsname\relax
> \writestatus{warning}{referenceformat in#1 not defined}
> \in[#1:#2]
> \else
> \csname in#1\endcsname[#1:#2]
> \fi}
And if you want to suppress unwanted spaces, you can add some "%":
\def\myin[#1:#2]{%
\expandafter\ifx\csname in#1\endcsname\relax
\writestatus{warning}{referenceformat in#1 not defined}%
\in[#1:#2]%
\else
\csname in#1\endcsname[#1:#2]%
\fi}
Cheers, Peter
--
http://pmrb.free.fr/contact/
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